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        <h2 id="像素"><a href="#像素" class="headerlink" title="像素"></a>像素</h2><ul>
<li>分辨率</li>
<li>物理像素（设备像素）</li>
<li>CSS像素（逻辑像素，设备独立像素，如px）</li>
<li>设备像素比（dpr）</li>
<li>标清屏和高清屏</li>
<li>缩放</li>
<li>PPI/DPI</li>
</ul>
<h3 id="设备像素比"><a href="#设备像素比" class="headerlink" title="设备像素比"></a>设备像素比</h3><p>dpr = 设备像素 / CSS像素（缩放为1的情况下）</p>
<p>设备像素比只对横向或纵向进行比较</p>
<h3 id="缩放"><a href="#缩放" class="headerlink" title="缩放"></a>缩放</h3><p>缩放改变的是CSS像素的大小</p>
<h3 id="PPI"><a href="#PPI" class="headerlink" title="PPI"></a>PPI</h3><p>每英寸的物理像素点</p>
<p>PPI越大，每英寸的物理像素点就越多，就越精细，反之亦然</p>
<p><img src="C:\Users\myc\AppData\Roaming\Typora\typora-user-images\image-20200828165233196.png" alt="image-20200828165233196"></p>

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